Madge Networks 802.11b Manual de usuario Pagina 27
- Pagina / 45
- Tabla de contenidos
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
DCF
• DCF, Distributed Coordination Function
– No central controller; just like Ethernet
– Protocols used are:
• CSMA/CA (CSMA with Collision Avoidance)
– Sense the channel before transmitting. If idle, transmits. It does
not sense the channel while transmitting
– Waits DIFS+RandomTime before transmitting
– Receiver waits SIFS time before acknowledging
– Using duration field in 802.11 frame other nodes backoff this
much amount of time (NAV)
• CSMA/CA with virtual channel
– Perform channel reservation
– RTS alerts and indicates duration of frame for sender’s range
– CTS alerts and indicates duration of frame for receiver’s range
- Link Layer Standards and 1
- Protocols 1
- Link Layer Standards 2
- Medium Access Control Layer 3
- Services 3
- Logical Link Control Services 4
- Standard Link Layer Protocols 5
- IEEE 802.5/IBM Token Ring 6
- Token Ring Operation 8
- Token Ring MAC Frame 9
- Other Features of Token Ring 10
- (ANSI X3T12) 11
- Wireless hosts 13
- • Laptop, PDA, IP phone 13
- • Run applications 13
- • May be stationary (non 13
- – e.g., Cell towers 14
- 802.11 access points 14
- Network 14
- Infrastructure 15
- Wireless Link Characteristics 18
- Wireless LANs and CSMA 19
- Hidden Terminal Problem 20
- Exposed Station Problem 21
- Access in Wireless 22
- IEEE 802.11 Wireless LAN 23
- 802.11 LAN architecture 24
- 802.11: Channels, association 25
- 802.11 Modes of Operation 26
- – Protocols used are: 27
- IEEE 802.11: Medium Access 28
- 802.11 sender 29
- 802.11 receiver 29
- - if frame received OK 29
- Avoiding Collisions (more) 30
- Collision Avoidance: RTS-CTS 31
- The 802.11 MAC Protocol… 32
- Extending Wireless Network 35
- Extending Wireless Network… 36
- 802.11 Frame: Addressing 37
- 802.11 frame: addressing 38
- 802.11 frame: more 39
- 802.11 Services 40
- 802.11 Services… 41
- Wi-MAX (802.16) 42
- The 802.16 Physical Layer 43
- 802.16 Physical Layer 44
- Other Popular Wireless 45
Relacionado con productos y manuales para Redes Madge Networks 802.11b
Redes Madge Networks 802.11b Guía de usuario
(7 paginas)
(7 paginas)
Shure KSM44 manuály
Uživatelské manuály a uživatelské příručky pro Mikrofony Shure KSM44.
Poskytujeme 1 manuály pdf Shure KSM44 ke stažení zdarma podle typů dokumentů: Uživatelský manuál
Comentarios a estos manuales